var DataObj = function  () {
	this.fruitNum = 0;
	this.double = 1;
	this.score = 0;
	this.alpha = 0;
	this.gameover = false;
}
DataObj.prototype.init = function(first_argument) {
	// body...
};
DataObj.prototype.draw = function() {
	var w = can1.width;
	var h = can1.height;

	ctx1.save();
	ctx1.fillStyle = "#fff";
	ctx1.fillText( "SCORE: "+ this.score, w*0.5, h-can_h+50);

	if( data.gameover){
		this.alpha += deltaTime * 0.001;
		if(this.alpha > 1){
			this.alpha = 1;
		}
		ctx1.fillStyle = "rgba(255,255,255,"+this.alpha+")";
		ctx1.fillText( "GAMEOVER", w*0.5, h*0.5);
	}
	ctx1.restore();
};
DataObj.prototype.addScore = function() {
	this.score += this.fruitNum * 100 * this.double; 
	this.fruitNum = 0;
	this.double = 1;
	mom.bigSwimCount = 0;
};